Why is Tunisia revolution called Jasmine revolution?

The media has dubbed the recent revolution in Tunisia the "Jasmine Revolution" based on the geopolitical nomenclature of "color revolutions," a term that described related movements throughout several former USSR and Balkan states in the early 2000s. Many of these movements have been successful in in Georgia's Rose Revolution (2003), Ukraine's Orange Revolution (2004), Lebanon's Cedar Revolution, and the more violent Tulip Revolution of Kyrgystan (2005). Each time massive street protests followed disputed elections or request of fair elections and led to the resignation or overthrow of leaders considered by their opponents to be authoritarian. The comparison is disputed, notably by many Tunisians themselves.